/**
  * Hooks
  */
 private function hooks()
 {
     // frontend only
     if (!is_admin()) {
         // breadcrumbs
         $breadcrumbs = new Breadcrumbs();
         add_action('wp', array($breadcrumbs, 'handleHooks'));
         // setup shortcode on frontend
         $shortcode = new Shortcode();
         $shortcode->setup();
     }
     // setup product link
     $productLink = new MetaBox();
     $productLink->add_hooks();
 }